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An electric heater which is connected to...

An electric heater which is connected to a 220V supply line has two resistance coils A and B of `24 Omega` resistance each. These coils be used separately (one at a time), in series or in parallel. Calculate the current drawn when:
(a) only one coil A is used.
(b) coils A and B are used in series.
(c) coils A and B are used in parallel.

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